RHS 350×250×12.5
Rectangular hollow sections from Eurocode 3 UK National Annex and ArcelorMittal Sections 2026-1.
Outline drawn from the published dimensions. Fillets and root radii are not shown.
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Height | 350 mm | 13.7795 in |
| Width | 250 mm | 9.8425 in |
| Thickness, t | 12.5 mm | 0.492126 in |
Bending about the major axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, Iₓ | 244,000,000 mm⁴ | 586.2123 in⁴ |
| Elastic modulus, Sₓ | 1,400,000 mm³ | 85.4332 in³ |
| Plastic modulus, Zₓ | 1,680,000 mm³ | 102.5199 in³ |
| Radius of gyration, rₓ | 131 mm | 5.1575 in |
| Distance to top fibre | 175 mm | 6.8898 in |
| Distance to bottom fibre | 175 mm | 6.8898 in |
Bending about the minor axis
| Property | Metric | Imperial |
|---|---|---|
| Second moment of area, I_y | 144,000,000 mm⁴ | 345.9614 in⁴ |
| Elastic modulus, S_y | 1,160,000 mm³ | 70.7875 in³ |
| Plastic modulus, Z_y | 1,330,000 mm³ | 81.1616 in³ |
| Radius of gyration, r_y | 101 mm | 3.9764 in |
Torsion and warping
| Property | Metric | Imperial |
|---|---|---|
| Torsion constant, J | 285,000,000 mm⁴ | 684.7152 in⁴ |
Mass
| Property | Metric | Imperial |
|---|---|---|
| Mass per metre | 112 kg/m | 75.2605 lb/ft |